OK - its as simple as that is it ?
Now I feel stupid !
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19 years ago
plastering plasterboard
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19 years ago
No worries, as a phrase it makes a bit more sense when talking about joists for example. So when they say 400mm centers that means the gap between each joist will only be less (i.e. 350mm ish on 50mm wide joists) since are measuring from the centre line of one to the next, and not from one edge to the next.